Look 1860 Census,St Clair Illinois,last name spelled Koesterer,his father
Philip,Mother Agnes,Berthold age 17 Born Baden,6 other siblings.all other
children born USA,Would have immigrated abt 1844-1848
Find on Ancestry.Com ,There living Freeburg Illinois.Oddly abt 5 miles from
where i was born.For miles around still a farming area.I was born in Belleville.